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Relay Computer
A relay computer is a computer system built primarily using relays and relay logic.
Overview
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Relay Systems
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System | Developer | Company/Institution | Relay Count | Year Complete | Notes |
---|---|---|---|---|---|
Model K | George Stibitz | Bell Labs | 1937 | ||
Model I | George Stibitz | Bell Labs | 400 | 1939 | |
Z2 | Konrad Zuse | 600 | 1939 | ||
Z3 | Konrad Zuse | 2,000 | 1941 | ||
Model II | Bell Labs | 440 | 1943 | ||
Z4 | Konrad Zuse | Zuse Apparatebau | 2,500 | 1944 | |
Model III | Bell Labs | 1,400 | 1944 | ||
Harvard Mark I | Howard Aiken | IBM | 3,500 | 1944 | |
Model IV | Bell Labs | 1400 | 1945 | ||
Model V | Bell Labs | 9,000 | 1946 | ||
Harvard Mark II | Howard Aiken | IBM | 1947 | ||
SSEC | IBM | 21,400 | 1948 | vacuum tubes & relays hybrid | |
Model VI | Bell Labs | 1950 | |||
BARK | Matematikmaskinnämnden | 8,000 | 1950 | ||
Mark I | Electrotechnical Laboratory | 1952 | |||
Z5 | Konrad Zuse | Zuse KG | 2,500 | 1953 | |
FACOM 100 | Fujitsu | 1954 | |||
Z11 | Konrad Zuse | Zuse KG | 1,665 | 1955 | |
Mark II | Electrotechnical Laboratory | 22,253 | 1955 |
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